Why doesn't LOCK mean LOCK when editing content details?

Until you Plex Dance that item - nothing will ever change.

You have a bogus bundle that you need to re-do. <—another thing Plex can’t seem to do is re-write a bogus bundle with a new one by clicking ‘Refresh Metadata’, requiring the oldest Plex Work-Around - The Plex Dance:

ALL steps in the exact and precise order described, or it simply won’t work. You should also be aware - if you don’t name your files so they can be instantly matched - this problem will NEVER go away. The correct time to fix that - is halfway through The Plex Dance - while the item(s) are not where Plex can see them - so when Plex does see them - they’re perfect.